Thumb Spica Splint Adjustable Breathable Thumb Brace with Wrist Support for De Quervain Tendonitis Arthritis Injury Recovery. The thumb spica splint immobilizes the thumb while supporting the wrist and palm, following the hand's natural contour to limit excessive movement and reduce strain on joints, tendons, and ligaments. An individual thumb loop with adjustable hook-and-loop closure keeps the thumb securely positioned and accommodates different thumb sizes. Extended wrist and palm coverage with multiple straps delivers added stability and prevents shifting during daily activities. Perforated fabric enhances breathability and airflow, minimizing heat buildup during extended wear while remaining lightweight and durable. Multiple adjustable hook-and-loop closures allow a customized fit and make donning/doffing quick and straightforward. Ideal for thumb sprains, ligament strain, tendonitis, repetitive strain from device/mouse use, and supportive stabilization during recovery. Consult a physician for severe injuries or post-surgical us.